fix: open system installer when OTA session fails

app/build.gradle

@@ -34,8 +34,8 @@ android {
         applicationId "com.evsuite.abrp"
         minSdk 27
         targetSdk 36
-        versionCode 28
-        versionName "2.2.11"
+        versionCode 29
+        versionName "2.2.12"
 
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
     }

app/src/unstable/AndroidManifest.xml

@@ -10,6 +10,16 @@
     <uses-permission android:name="android.permission.REQUEST_INSTALL_PACKAGES" />
 
     <application>
+        <provider
+            android:name="androidx.core.content.FileProvider"
+            android:authorities="${applicationId}.fileprovider"
+            android:exported="false"
+            android:grantUriPermissions="true">
+            <meta-data
+                android:name="android.support.FILE_PROVIDER_PATHS"
+                android:resource="@xml/ota_file_paths" />
+        </provider>
+
         <receiver
             android:name=".OtaInstallResultReceiver"
             android:exported="false">

app/src/unstable/java/com/evsuite/abrp/OtaUpdater.java

@@ -4,8 +4,13 @@ import android.app.PendingIntent;
 import android.content.Context;
 import android.content.Intent;
 import android.content.pm.PackageInstaller;
+import android.net.Uri;
+import android.os.Build;
+import android.provider.Settings;
 import android.util.Log;
 
+import androidx.core.content.FileProvider;
+
 import org.json.JSONArray;
 import org.json.JSONException;
 import org.json.JSONObject;
@@ -414,6 +419,8 @@ final class OtaUpdater {
         UNREADABLE_ARCHIVE,
         /** Handed to the platform. The outcome arrives at {@link OtaInstallResultReceiver}. */
         SESSION_STARTED,
+        /** Session install was unavailable; the system's interactive installer was opened. */
+        INSTALL_UI_STARTED,
         /** The session could not be created, written or committed. */
         SESSION_FAILED
     }
@@ -437,8 +444,14 @@ final class OtaUpdater {
             commitSession(context, apk);
             return InstallResult.SESSION_STARTED;
         } catch (Throwable t) {
-            Log.w(TAG, "OTA session install failed", t);
-            return InstallResult.SESSION_FAILED;
+            Log.w(TAG, "OTA session install failed; trying system install UI", t);
+            try {
+                launchInstallerActivity(context, apk);
+                return InstallResult.INSTALL_UI_STARTED;
+            } catch (Throwable fallback) {
+                Log.w(TAG, "OTA install UI failed", fallback);
+                return InstallResult.SESSION_FAILED;
+            }
         }
     }
 
@@ -511,4 +524,41 @@ final class OtaUpdater {
         }
     }
 
+    /** DriveHub_Dort-compatible fallback for head units that refuse installer sessions. */
+    private static void launchInstallerActivity(Context context, File apk) {
+        if (Build.VERSION.SDK_INT >= 26
+                && !context.getPackageManager().canRequestPackageInstalls()) {
+            Intent settings = new Intent(Settings.ACTION_MANAGE_UNKNOWN_APP_SOURCES)
+                    .setData(Uri.parse("package:" + context.getPackageName()))
+                    .addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+            context.startActivity(settings);
+            throw new IllegalStateException("unknown sources permission required");
+        }
+
+        Uri contentUri = FileProvider.getUriForFile(context,
+                context.getPackageName() + ".fileprovider", apk);
+        Intent install = new Intent(Intent.ACTION_VIEW)
+                .setDataAndType(contentUri, "application/vnd.android.package-archive")
+                .addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_GRANT_READ_URI_PERMISSION);
+        grantToInstallers(context, contentUri);
+        if (install.resolveActivity(context.getPackageManager()) == null) {
+            throw new IllegalStateException("No package installer activity");
+        }
+        context.startActivity(install);
+        Log.i(TAG, "System install UI opened for " + apk.getName());
+    }
+
+    private static void grantToInstallers(Context context, Uri uri) {
+        String[] packages = {
+                "com.android.packageinstaller",
+                "com.google.android.packageinstaller",
+                "com.samsung.android.packageinstaller"
+        };
+        for (String packageName : packages) {
+            try {
+                context.grantUriPermission(packageName, uri, Intent.FLAG_GRANT_READ_URI_PERMISSION);
+            } catch (Throwable ignored) { }
+        }
+    }
+
 }

app/src/unstable/java/com/evsuite/abrp/UpdateHook.java

@@ -117,10 +117,12 @@ final class UpdateHook {
         if (apk == null) return "İndirme veya SHA-256 doğrulaması başarısız ("
                 + update.versionName + ")";
 
-        // The cached APK is cleared whichever way install goes: a rejected archive must not
-        // linger, and an accepted one has already been streamed into the installer session.
         OtaUpdater.InstallResult result = OtaUpdater.install(app, apk);
-        if (!apk.delete()) Log.w(TAG, "Could not remove cached OTA APK");
+        // FileProvider's interactive installer opens asynchronously and still needs this file.
+        // Other outcomes have either streamed the bytes already or rejected the archive.
+        if (result != OtaUpdater.InstallResult.INSTALL_UI_STARTED && !apk.delete()) {
+            Log.w(TAG, "Could not remove cached OTA APK");
+        }
 
         switch (result) {
             case SESSION_STARTED:
@@ -128,6 +130,8 @@ final class UpdateHook {
                 // platform may still want the driver to confirm, and either way the verdict
                 // arrives at OtaInstallResultReceiver, not here.
                 return "Kuruluyor: " + update.versionName + " — ekrandaki onayı bekleyin";
+            case INSTALL_UI_STARTED:
+                return "Kurulum ekranı açıldı: " + update.versionName;
             case UNREADABLE_ARCHIVE:
                 return "Kurulum reddedildi: APK okunamadı";
             default:

app/src/unstable/res/xml/ota_file_paths.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<paths>
+    <cache-path name="ota_cache" path="." />
+</paths>